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MAX1776

MAX1776

24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter

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Overview

Description

The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to VIN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).

The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.

High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.
MAX1776: Typical Operating Circuit MAX1776: Typical Operating Circuit Enlarge+

Key Features

  • Fixed 5V or Adjustable Output
  • 4.5V to 24V Input Voltage Range
  • Up to 600mA Output Current
  • Internal 0.4Ω P-Channel MOSFET
  • Efficiency Over 95%
  • 15µA Quiescent Supply Current
  • 3µA Shutdown Current
  • 100% Maximum Duty Cycle for Low Dropout
  • Current-Limited Architecture
  • Thermal Shutdown
  • Small 8-µMAX Package

Applications/Uses

  • Distributed Power Systems
  • Handheld Devices
  • Keep-Alive Supplies
  • Notebook Computers

Parametric Specs

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		Output Adjust. MethodIOUT1
(A)		Switch TypeDC-DC OutputsOper. Freq.
(kHz)		Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1776 4.5241.25245
Preset
Resistor
0.6Internal1200
UMAX/8
$4.13 @1k
See All Step-Down Switching Regulators (403)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources


MAX1776EVKIT: Evaluation Kit for the MAX1776

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs
App Note 225 Using Digital Potentiometers in Adjustable Step-Down DC-DC Converter Designs

Quality and Environmental Data

Product Reliability Reports: MAX1776.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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Technical Docs

Reference Designs

Type ID Title
Evaluation Board3114MAX1776EVKIT Evaluation Kit for the MAX1776